Date of Issue: April 2008
3-5
WDP30X
5. SPARK PLUG
INSPECTION
NOTICE
An incorrect spark plug can cause engine damage. Use the
recommended spark plug or an exact equivalent.
1. Visually inspect the spark plug. Discard the plug if the
insulator is cracked or chipped.
2. Measure the plug gap with a wire-type gauge. If
necessary, adjust the gap by bending the side electrode.
3. Make sure the sealing washer is in good condition and
replace if necessary.
4. Install the plug finger-tight to seat the washer, then tighten
with a plug wrench.
New plug: tighten 1/2 turn after the sealing washer seats.
Reused plug: tighten 1/8 ~ 1/4 turn after the washer seats.
NOTICE
A loose spark plug can overheat and damage the engine.
Overtightening can damage the threads in the cylinder
head.
5. Install the spark plug cap.
Recommended spark plug
NGK
BPR6ES
Spark plug gap
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
0.7~ 0.8 mm
(0.028 ~ 0.031 in)
SEALING
WASHER
Summary of Contents for WDP30X
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